Tread for a tire



FIG. 1 is a perspective view showing the tread for a tire which forms our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right side elevation view thereof, this view and the left side elevation view being mirror images; and,

FIG. 4 is an enlarged partial perspective view thereof.

The broken lines in the figures indicate unclaimed environment that form no part of the claim. 

CLAIM The ornamental design for a tread for a tire, as shown and described. 